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Stock Bars to Renthal 758 Super Lows
#1
Hi all,

Thought I would share some info on my first significant mod where I switched from my Stock Handlebars to a set of Renthal 758 Super Lows (7/8" in Black). I picked a set up from Dennis Kirk (Order info: Renthal Ultra Low Handlebar - 758-01-BK Part #: 5905282).

Stock vs Renthal comparison:

Several inch drop in the Renthal over Stock.

Stock side shot vs Renthal comparison:


Angular bend feels to be quite comparable to stock so ergonomics feels pretty spot on.

Just for kicks, I flipped the Renthal bar over to see if you could run them in a "Clip on" mode.

One problem I see with this approach is the lack of clearance on each side btwn the Switch Clusters & the Tank.

Since I'm sure Handlebar swaps have been covered, I'll simply share a couple of "tricks" I found along the way for posterity's sake:

To remove the LH Grip, I slipped a flat blade screwdriver btwn the Grip and the Bar and shot some WD-40 in. I slid the screwdriver around every 90 degrees or so, reapplying the WD-40. Gave a gentle tug and viola, Grip slid right off.

The WD-40 was still present enough during reassembly that the grip slid on the new Bar with no trouble. I went out an hour afterwards, and the grip was stuck in place firmly, so the WD-40 evaporates in short time.

Lastly, I came across a thread on this Forum in the Search function which demonstrated how to remove the four beauty Plugs covering the SHCS's in the Bar Clamps using a Cargo Knife. I use a Lock-blade Knife, worked quite well. This step should be approached delicately so as not to damage the little beauty Plugs.

Speaking of the beauty Plugs, I recommend waiting until the job is complete and you've test ridden to ensure the Bar is set exactly where you want before reinstalling the Plugs. Otherwise you end up removing them multiple times...although you do improve your technique and it goes easier each time. I found four times was perfect for me. Rolleyes

Anyway, hope this helps somebody as much as a couple of the other Handlebar posts helped me along the way.

Cheers!
One thing I forgot to mention, the Throttle Cable does not run the same path as it did when stock, for obvious reasons. I can now feel a very slight amount of resistance on the Throttle. I'm suspecting it is due to the angle change of the Cables.

Would I be ok altering the Radius of the two metal Metal Guides attached to the Switch Cluster to created a more gentle radius, hopefully relieving the resistance on the Cables?
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#2
Looks like the cables are now too long for the run. I'd get that figured out before you head out on the road as it may get worse when you turn the bars. I'm not sure if they can be shortened--a new custom length set may be in order.
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#3
I've also lowered my bars but have no issues with the throttle cables at all. Maybe try to tinker a little more and fix them. Also, the resistance could be coming from the throttle cylinder (perhaps the bar-end weight is overtightened etc), or from the new grip pressing to tightly against the switch cluster. I'm not saying you are wrong, just tinker some more

'14 CB1100 STD 5 speed
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#4
same as tod, my lower bars didn't restrict cable pull, and the location of cable elbow and mirror stem you show is similar with mine as well.

Phadreus, Did you notice the change in cornering with the lower bar? that's one of the first thing i noticed w/ my lower bar, the turning in and out of twisties felt easier and a bit quicker to execute w/ the change in body position
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#5
(08-02-2021, 10:33 PM)jedd_imp Wrote: same as tod, my lower bars didn't restrict cable pull, and the location of cable elbow and mirror stem you show is similar with mine as well.

Phadreus, Did you notice the change in cornering with the lower bar? that's one of the first thing i noticed w/ my lower bar, the turning in and out of twisties felt easier and a bit quicker to execute w/ the change in body position
Hey Jedd,

I did notice handling to be a bit sharper. I suspected it was do to a little more weight biased towards the front end, but not certain of that. Feels more confident to me during corner entrance, more planted if you will. I like it!

I'm going to tinker with the Cables again tonight, see if I can relieve some tension on them some. The added resistance is quite subtle, so there isn't much of an issue to resolve at this point.

Something else that surprised me, I haven't installed any Bar Ends yet. I expected to notice more vibrations, but nothing that I can perceive. Smooth as silk so far, so I'm no longer concerned about installing some bar weights like Honda provides from the factory. I have simple Bar Ends to install, but they are more for aesthetic purposes now than functional.
(08-01-2021, 12:10 PM)tod.branko_imp Wrote: I've also lowered my bars but have no issues with the throttle cables at all. Maybe try to tinker a little more and fix them. Also, the resistance could be coming from the throttle cylinder (perhaps the bar-end weight is overtightened etc), or from the new grip pressing to tightly against the switch cluster. I'm not saying you are wrong, just tinker some more

'14 CB1100 STD 5 speed
Hi ya Tod,

I double checked the items you suggested, good thoughts. All were fine, not causing any issues. I'm going to look at where the Cables enter around the Headlight and make sure there are no issues there next. Tinker shall solve this minor issue. Thumbs Up
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